Spin-Flop Transition and Magnetocaloric Effect through Disconnected Magnetic Blocks in Co$^{III}$ /Co$^{IV}$ Oxybromides
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TOULEMONDE, Olivier | |
| hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
| dc.contributor.author | ROUSSEL, Pascal | |
| hal.structure.identifier | Matériaux, Rayonnements, Structure [NEEL - MRS] | |
| dc.contributor.author | ISNARD, Olivier | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | ANDRE, G. | |
| hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
| dc.contributor.author | MENTRE, Olivier | |
| dc.date.created | 2010-02-03 | |
| dc.date.issued | 2010-05-28 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | The magnetic properties of the layered Banþ1ConO3n-1Br (n=5 and 6) oxybromides have been determined by means of magnetization measurements and neutron diffraction under variable magnetic field. For n=6, the magnetic phase diagram has been built on the basis of several features, including the notions of short-range ordering, spin reorientation, and spin-flop transitions. In those compounds, the competition between magnetic exchanges arise from the existence of [Ba2O2Br]- double-layers that separate perovskite 2D-blocks. The latter are dominated by ferromagnetic (FM) intraexchanges while the interblock exchanges are antiferromagnetic (AFM). Interestingly, a perturbation created by an external magnetic field could be on the same order of magnitude than the interblock exchange leading to a complex set of spin reorientations versus H and T. From the point of view of magneto-crystalline anisotropy, theAFMsystem with moments parallel to the c-axis turns into a FM system with moments aligned in the perpendicular (a,b) planes. The magnetic entropy is distributed within at least three phenomena, spread out in a wide range of temperature. Here, the influence of the magneto-crystalline anisotropy on the magnetocaloric effect is unambiguously shown. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.title.en | Spin-Flop Transition and Magnetocaloric Effect through Disconnected Magnetic Blocks in Co$^{III}$ /Co$^{IV}$ Oxybromides | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/cm100571v | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci] | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 3807-3816 | |
| bordeaux.volume | 22 | |
| bordeaux.issue | 12 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00968019 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00968019v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2010-05-28&rft.volume=22&rft.issue=12&rft.spage=3807-3816&rft.epage=3807-3816&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=TOULEMONDE,%20Olivier&ROUSSEL,%20Pascal&ISNARD,%20Olivier&ANDRE,%20G.&MENTRE,%20Olivier&rft.genre=article |
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